Jeffrey F. Mount is Professor of Geology at the University of California, Davis. Janice C. Fong is Principal Illustrator in the Department of Geology at the University of Californi...lihat lebih banyakJeffrey F. Mount is Professor of Geology at the University of California, Davis. Janice C. Fong is Principal Illustrator in the Department of Geology at the University of California, Davis.lihat lebih sedikit